Checkpoint Inhibitors and SBRT for mCRPC

Metastatic Castration-resistant Prostate Cancer Clinical Trial

— CheckPRO  

Official title:

Randomised Phase 2 Trial of Stereotactic Body Radiation Therapy, SBRT in Combination With Checkpoint Inhibitors in Metastatic Castration-resistant Prostate Cancer

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05655715
• Other study ID #: UR1840
• Status: Recruiting
• Phase: Phase 2
• Start date: November 25, 2019
• Est. completion date: January 11, 2025

Study information

• Verified date: December 2022
• Source: Herlev and Gentofte Hospital
• Contact: Rikke HL Eefsen, MD, PhD
• Phone: 38689381
• Email: rikke.helene.loevendahl.eefsen[@]regionh.dk
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The goal of this investigator-initiated, single-center, and randomized phase II trial is to investigate the potential synergistic effect of combining stereotactic body radiotherapy of a single soft tissue- or bone metastasis with ipilimumab and nivolumab in patients with mCRPC and perform translational analyses on tissue and blood, searching for predictive biomarkers of efficacy and toxicity. Participants will be randomized to receive ipilimumab and nivolumab with or without stereotactic body radiotherapy (SBRT).

Description:

The participants receive treatment for 52 weeks, including four cycles of ipilimumab and nivolumab with or without concomitant SBRT (24 Gray in three fractions) to a single soft tissue or bone metastasis, followed by 10 cycles of nivolumab. Participants are followed until progression, death, or for 12 months after the end of treatment. Biopsies from metastatic sites are collected at baseline, before the third treatment, and at the end of treatment. Blood sampling for immune monitoring and circulating tumor DNA is performed consecutively at baseline and every radiographic assessment.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 90
• Est. completion date: January 11, 2025
• Est. primary completion date: January 12, 2024
• Accepts healthy volunteers: No
• Gender: Male
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

1. Have a signed Independent Ethics Committee (IEC)-approved informed consent form prior to any study-specific evaluation. Subjects must be willing and able to comply with scheduled visits, treatment schedule, lab testing and other requirements of the study.

2. Male =18 years of age at the time consent form is signed

3. Have a histologically or cytologically confirmed adenocarcinoma or poorly differentiated carcinoma of the prostate (pure small-cell histology or pure high-grade neuroendocrine histology are excluded; neuroendocrine differentiation is allowed)

4. If possible, metastases accessible for image-guided percutaneous biopsy should be performed, if considered safe assessed by the PI.

5. Surgically or medically castrated, with serum testosterone levels <50 ng/dL (1.73 nM). For patients currently being treated with luteinizing hormone-releasing hormone (LHRH) agonists (i.e., patients who have not undergone an orchiectomy) therapy must be continued throughout the study

6. Eastern Cooperative Oncology Group (ECOG) performance status 0-1

7. Life expectancy greater than 3 months

8. Evidence of disease progression after prior therapy for mCRPC:

1. Disease progression after treatment with 1 androgen-receptor (AR) targeted therapies (abiraterone acetate, enzalutamide or investigational AR-targeted drug) for castrate-resistant disease AND

2. Disease progression after treatment with 1 line of taxane-based chemotherapy for castration resistant disease. Prior taxane therapy administered for hormone sensitive disease is permitted and is not counted toward this limit. Disease progression after initiation of most recent therapy is based on any of the following criteria: i. Rise in PSA: a minimum of 2 consecutive rising levels, with an interval of = 1 week between each determination. The most recent screening measurement must have been = 2ng/mL j. Transaxial imaging: New or progressive tumor on CT or MRI scans as defined by RECIST 1.1 or new lesions on bone scan per PCWG3.

9. Have adequate organ function confirmed by the following laboratory values obtained within 14 days prior to the first dose of immunotherapy with nivolumab and ipilimumab: a. Bone marrow function: i. Absolute neutrophil count (ANC) = 1.5 x 109/L ii. Platelets > 100 x 109/L iii. Hemoglobin = 9 g/dL (5.6 mmol/L) independent of transfusion within 14 days b. Hepatic function: i. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) < 3 x upper limit of normal (ULN). For patients with liver metastases AST and ALT < 5 x ULN ii. Bilirubin < 1.5 x ULN c. Renal function: Serum creatinine < 1.5 x ULN d. Coagulations status: International Normalized Ratio (INR) = 1.5

10. Male patients with female partners of childbearing potential may be enrolled if they

are:

1. Documented to be surgically sterile (ie, vasectomy): or

2. Committed to practicing true abstinence during treatment and for 4 months after the last dose of immunotherapy; or

3. Committed to using any contraception method with a failure rate of less than 1% per year of contraception (refer to protocol) with their partner during treatment and for 4 months following last dose of immunotherapy.

Exclusion Criteria:

1. Active malignancy, with the exception of curatively treated non-melanoma skin cancer, carcinoma in situ, or superficial bladder cancer

• Patients with a history of malignancy that has been completely treated, and currently with no evidence of that cancer, are permitted to be enrolled in the trial provided all chemotherapy was completed > 6 months prior and/or bone marrow transplant > 2years prior to first dose of ipilimumab and nivolumab

2. Prior therapy with an anti-programmed cell death protein 1 (anti-PD1), anti-programmed death-ligand 1 (anti-PD-L1), anti-CD137 or anti-CTLA4 antibody or any other antibody or drug specifically targeting T-cell co-stimulation or checkpoint pathways.

3. Symptomatic and/or untreated central nervous system (CNS) metastases. Patients with asymptomatic, previously treated CNS metastases are eligible provided they have been clinically stable (i.e., not requiring steroids for at least 4 weeks prior to first dose of ipilimumab and nivolumab and have had appropriate scans screening assessments)

4. Symptomatic or impending spinal cord compression unless appropriately treated, clinically stable and asymptomatic

5. If patient have an active known or suspected autoimmune disease. Subjects are permitted to enroll if they have vitiligo, type 1 diabetes mellitus, residual hypothyroidism due to autoimmune condition only requiring hormone replacement, psoriasis not requiring systemic treatment or conditions not expected to recur in the absence of an external trigger

6. Known human immunodeficiency virus (HIV) or acquired immunodeficiency syndrome (AIDS)-related illness or history of chronic hepatitis B or C

7. Received treatment with chemotherapy, hormonal therapy (with the exception of LHRH analog), radiation, antibody therapy or immunotherapy, gene therapy, vaccine therapy, angiogenesis inhibitors or experimental drugs within 4 weeks prior to first dose of ipilimumab and nivolumab

8. Adverse effect of prior therapy not resolved to CTCAE Grade 1 or below with the exception of alopecia. Ongoing Grade 2 non-hematologic toxicity related to most recent treatment regimen may be permitted with prior advanced approval from the sponsor

9. Initiated denosumab or bisphosphonate therapy or adjusted denosumab or bisphosphonate dose/regimen within 4 weeks prior to first dose of ipilimumab and nivolumab. Patients on stable denosumab or bisphosphonate regimen are eligible and may continue treatment

10. Non-study related minor surgery procedure <5 days or major surgery < 21 days prior to first dose of ipilimumab and nivolumab; in all cases the patient must be sufficiently recovered and stable before treatment administration

11. Presence of auto-immune diseases

12. Presence of any other condition that may increase the risk associated with study participation or may interfere with the interpretation of study results, and in the opinion of the investigator would make the patient inappropriate for entry into the study

13. Patients should be excluded if they have a condition requiring systemic treatment with either corticosteroids ( >10mg daily prednisone equivalents) or other immunosuppressive medications within 14 days of study drug administration. Inhaled or topical steroids and adrenal replacement doses > 10mg daily prednisone equivalents are permitted in the absence of active autoimmune disease

14. As there is a potential risk for hepatic toxicity with nivolumab/ipilimumab combinations, drugs with a predisposition to hepatotoxicity should be used with caution in patients treated with nivolumab/ipilimumab containing regimen

15. Allergies

1. History of allergy to study drug components

2. History of severe hypersensitivity reaction to any monoclonal antibody

Related Conditions & MeSH terms

• Castrate Resistant Prostate Cancer
• Metastatic Castration-resistant Prostate Cancer
• Prostate Cancer Metastatic
• Prostate Cancer Stage IV
• Prostatic Neoplasms

Intervention

Radiation:
• Stereotactic body radiotherapy
8 Gray x 3

Drug:
• Ipilimumab Injection [Yervoy]
1 mg/kg IV Q3W for four doses,
• Nivolumab Injection [Opdivo]
Nivolumab 3mg/kg IV Q3W for four doses, then then Nivolumab 480mg IV Q4W

Procedure:
• Biopsies
From soft tissue metastases.

Locations

Country	Name	City	State
Denmark	Department of Oncology, Copenhagen University Hospital Herlev and Gentofte Hospital	Herlev	Capital Region

Sponsors (2)

Lead Sponsor	Collaborator
Herlev and Gentofte Hospital	Bristol-Myers Squibb

Country where clinical trial is conducted

Denmark, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Co-primary endpoint 1	Objective response rate (ORR) according to modified Response Evaluation Criteria in Solid Tumours (RECIST1.1) per Prostate Cancer Clinical Trials Working Group (PCWG3) criteria for patients with measurable disease	From baseline until progression (up to 24 months)
Primary	Co-primary endpoint 2	Prostate-specific antigen (PSA) response rate of = 50% decline from baseline at any time from treatment start (confirmed after = 4 weeks, all patients with measurable and non-measurable disease)	Any time after treatment start (confirmed = 3 weeks later, up to 24 months)
Secondary	Adverse events (Safety)	Common Terminology Criteria for Adverse Events (CTCAE) v. 5	From inclusion to 100 days after the last dose of ipilimumab or nivolumab or until the last study visit (up to 24 months)
Secondary	Radiographic progression-free survival	Per PCWG3 with 2+2 rule and clinical progression (all patients)	From baseline until progression (up to 24 months)
Secondary	Clinical benefit rate	Per RECIST 1.1 and Immune Response Evaluation Criteria in Solid Tumours (iRECIST)	From baseline until progression (up to 24 months)
Secondary	Objective response rate (ORR)	Per iRECIST	From baseline until progression (up to 24 months)
Secondary	PSA progression-free survival	Per PCWG3	beyond 12 weeks (up to 24 months)
Secondary	Survival	Overall survival	From randomization until death by any cause or last follow-up (up to 24 months)
Secondary	European Organization for Research and Treatment of Cancer Quality of life of cancer patients (EORTC QLQ-C30)	Questionaire The EORTC QLQ-C30 is a validated questionnaire to assess the quality of life of cancer patients. It includes 30 questions, divided into three major dimensions of global health status, functional-, and symptoms scale. The scales are calculated into a score ranging from 0-100. A high score on global health status and functional scales represents a better quality of life, but a high score on the symptoms scale represents a high burden of symptoms/low quality of life.	Baseline and then every 8 weeks (up to three times) until end-of-treatment (up to 24 months)